I got a level 150 lightning egg and I was so excited to hatch the egg...that when I went to put the egg down I accidentally ate it instead. :( ps4 users: R2 ISN'T GONNA DROP THE EGG YOU'RE GONNA EAT IT LIKE ANY OTHER EGG. REMEMBER THIS. LOGIC BEFORE EXCITMENT.

1.kill some penguin to get polymer
2.tame pteranodon (don't forget to whistle passive)
3.place beds nearby the wyvern nest (but far enough not to aggro wyvern)
4.sneak and grab the egg
5.fly away near the bed
6.eat polymer
7.died and wait a moment before respawn at bed
8.go collect your corpse and ptera then repeat these steps again

I not sure why but when I kill myself, the wyvern didn't attack my ptera anymore. I use 1 ptera to sneak in and repeat this trick >>> I got 3 wyvern eggs